Lathe.



No. 712,277. Patented Oct. 28, i902.

0. G. EDMDNDL LATHE.

(Application vflad Nav. 30, 1901.) (No Model.) 5 SheeiS--Sheet l.

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No. 712,277. A Patented Oct. 28, |902.

. 0. G. EDMOND.

LATI-IE. (Appucaeion mea N'ov. ao, 190m (No Model.) 5 Sheets-Sheet 4.

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Patented Oct. 28, |902. '0. EDMND.

LATHE. Apgucmon mea Nav. so, 190m No. A7|2,277.

( No Model.)

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UNiTED STATES PATENT OFFICE.

OSCAR G. EDMOND, OF WAUSAU, WISCONSIN.

LATHE.

SPECIFICATION forming part of Letters Patent N o. 712,277, dated October28, 1902. Application iiled November 30, 1901. Serial No. 84,168. (Nomodel.)

To all who-m, t may concern,.-

Beit known that I, OSCAR G. EDMOND,a citi- Zen of the United States, anda resident of Wausau, in the county of Marathon and State of Wisconsin,have invented a new and Improved Lathe, of which the following is a full, clear, and exact description.

This invention relates to an automatic lathe for turning spindles,balusters, handles, and like articles; and it comprises means forfeeding the work and cutting it off at even lengths, after which thework passes to work-carriers which move arbitrarily and at the same timeturn independently around acutter, which isv of the rotary type.

This specification is a specific description of one form of theinvention'7 while the claims are definitions of the actual scopethereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of the `invention. Fig. 2 is a fragmentaryplan view thereof. Fig. 3 is a sectional elevation on the line 3 3 ofFig. 1. Fig. 4 is a cross-section on the line 4 4 of Fig. 1. section ofthe machine on the line 5 5 of Fig. 2. Fig. 6 is a detail section of oneofthe bearing-bushings, and Fig. 7 is a det-ail view of the cam-guidefor releasing the work.

As shown best in Fig. 1, the lathe has a bed 10, supported at its endson pedestals 11. On' this bed are mounted the head-bearings 12 and 14.ln these head-bearings 12 and 14 is mounted the main shaft 15 of thelathe, which is carried loosely in bushings 16, split as indicated inFig. 6. These .bushings 16 are heldin boxes 17, in turn carried insleeves 18, which turn freely in Athe head blocks or bearings 12 and 14.The sleeves 18 have disk-like heads 19 formed on their inner ends, suchheads being peripherally toothed, as will be hereinafter fullydescribed, and radially slotted, as indicated at 20, so as to carry thework-holders, which will be hereinafter described. The shaft 15, at apoint between the heads 19, carries the cutter-head 2l, to whichsuitable knives are fastened, as will be fully understood by personsskilled in the art.

Fig. 5 is a'longitudinal' f4.) On the shaft 24 is a clutch-pulley 25,

serving to drive a belt 26,` running to a conepulley 27, loose on theshaft 28, which drives the heads of the machine. Movement is irnypartedto the shaft 28 at a reduced speed from the pulley 27 through the mediumof trains of gears. (Indicated by dotted lines at 29 in Fig. 1 and byfull lines in Fig. 4.) Fastened to the shaft 28 are pinions 30, (seeFigs. 3 and 4,) and these pinions are meshed, respectively, with theheads 19 at their periphery, so as to impart a continuous rotarymovement thereto, such movement being, however,very much reduced withrespect to that of the shaft 15. The clutch-pulley 25 is operated bymeans of a lever 3l, connected by a rod 32 to a handlever 33, located atthe side of the machine in positionfor convenient operation.

34 indicates. two brackets which are fastened to the front of themachine, as best indicated in Figs. 1 and 2. These brackets carryrevolubly the shaft 35 of the saws 36 the stock as it passes into thelathe, such operation being indicated by the lower dotted lines in Fig.2. The carriers 38 for taking the work past the saws into the lathe aremounted onsprocket-wheels carried by the shaft 37 at the inner ends ofthe carriers and by eX- tensions of the brackets 34 at the outer ends ofthe carriers.

41 indicates feed-guides under which the work is moved by the carriersand by which the work is held firmly during the sawing operation, thesefeed-guides 41 being sustained on arms 42, projecting up from thebrackets 34 and being adjustable byhand-screws 43. Located at the innerextremities of the carriers 38 are stops 44, (best shown in Fig. 4,)such stops having the work pressed against them by the carriers andholding the work until it is engaged and lifted by the workholders, tobe hereinafter described. One of the brackets 34 may be adj'ustablymounted,

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so that the brackets may be relatively adjusted to suit the length ofthe work. This is indicated at the right-hand end of Fig. 1, where ascrew 45 is shown for facilitating the adjustment.

The work-holders comprise axially-immovable center pins 46 andaxially-movable pins 47, arranged in pairs, so as to engage the ends ofthe work and hold it in longitudinal alinement with the pins. Each pinis carried in a sleeve 48, and in order to render the pins 47 axiallymovable springs 49 are provided, these springs being located in thesleeves 48 and bearing against the pins. The pins 47 have headed shanks50 attached thereto and projecting outward beyond the sleeves. All ofthe axially-movable pins 47 are arranged in one of the heads 19, and theaxially-immovable pins are arranged in the other head, theaxially-movable pins being provided to permit of engaging anddisengaging the work. Each sleeve 48 is carried in a block 5l, theseblocks being fitted to move radially in the orifices 2O of the heads 19and having rollers or like guide devices 52 and 53, which rollers run oneccentric tongues 54, formed on guide-rings 55, bolted, respectively, tothe head bearings 12 and 14. These tongues 54 being eccentric to theshaft 15, as the heads 19 turn eccentrically around this shaftindependent radial movement will be imparted to the blocks 51, and thiswill move the pins 46 and 47 laterally toward and from the shaft 15 inaddition to their circular movement. The sleeves 48 are revolubly fittedin the blocks 51 and are, with the pins 46 and 47, given a rotarymovement independently of the circular movement of the pins. This rotarymovement is effected by means of pinions 56, fastened on the sleeves andmeshed with internal gears on the rings 55. The springs 49 press theaxially-movable pins 47 into engagement with the work, so that normallythese pins are active. The pins are moved backward into inactiveposition by means of a cam-guide 57, which is located at the front sideofthe machine on the headbearing 12, just below the point at which thework is fed to the work-holders. This camguide is in the form of agrooved slot, and it is adjustably mounted by means of a slotted lug 58on the guide 57 and a set-screw 59 iitted in the slot.

60 indicates a hand-lever connected with the guide and with thehead-bearing to facilitate the adjustment of the guide, so that thebackward movement may be imparted to the axially-movable pins at exactlythe period desired. The guide 57 is attached to a shoe or extension 12of the head-bearing 12, this shoe serving to place the guide in properline with the path of the work-holding pins, it being understood thatthe eccentric rib or tongue 54 is removed from the shaft 15 at thispoint, so as to disengage the work from the cutters on the head 21. Theguide 57 is not only cam-shaped, as indicated best in Fig. 7,

but it is also curved in accordance with the curve of the rib or tongue54, this formation being necessary so as to insure that the stems 5() ofthe work-holding pins 47 will move true through the guide 57.

In the operation of the machine the knives of suitable form are placedon the cutterhead 21 in such position as to produce the desired patternon the work-for example, the pattern indicated by dotted lines in theupper part of Fig. 2. I have not described the special form of theknives or other arrangement, since this is not necessarily a part of mypresent invention. The work in rough form is placed on the carriers 38,parallel with the shaft 15 and extending from one carrier to the other.These carriers advance the work under the guides 41 and then the saws 36act on the ends of the work to cut it oft into equal lengths. The workpasses onto the stops 44, against which it is held by the steadypressure behind it. The heads 19 revolving slowly approach a certainpair of the holding-pins 46 and 47 to the work. The guide 57 is soarranged that the instant this certain pin 47 gets in longitudinalalinement with the work the stem of this pin is released and the spring49 asserts itself, causing the pin to press against the work and hold itfirmly between this pin and its companion axial1yimmovable pin. The workbeing thus grasped it is carried from the' stops 44 around with thesteadily-rotating heads. The work is not only moved circularly aroundthe cutter-head 22, but it is also given a slow independent rotarymovement. The form of the guide tongue or rib 54 now causes thework-holders to be moved inward toward the cutter-head, and finally theknives begin to act on the work. This operation goes on until the workreaches the front side of the machine just under the feeding.,r devices,whereupon the work of the knives will be finished, and the stem 50 ofthe pin 47, above referred to, then runs into the guide 57. Thisretracts the pin, andthe work is dropped, whereupon the pin moves on andout of the guide to engage another piece of work.

The above description traces the operation of one pair of work-holdingpins. It is obvious that during this time all of the other workholdingpins are in operation in their proper sequence.

Various changes in the form and details of my invention may be resortedto at will without departing from the spirit of my invention. Hence Iconsider myself entitled to all forms of the invention as may lie withinthe intent of my claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of a rotary head, a block radiallymovable thereon,a work-holder revolubly mounted in the block andprovided IOO IIO

with a gear at one end, an eccentric guide engaged by the block andmoving said block radially in and out, and an eccentric internal gear onthe guide and with which the gear on the Work-holder meshes, as setforth.

2. The combination of a rotary head, provided with radial slots, blocksmounted to slide in the slots of the head, sleeves mounted to turn inthe blocks and each provided with a gear at one end, Work-holding pinsmounted in the sleeves, an eccentric guide with which the blocks engageand by means Y of which the blocks are moved in and out in the slots ofthe head, and an eccentric internal gear with which the gears of thesleeves mesh, as set forth.

3. The combination of a head-bearing, a head arranged toturn thereon, ablock arranged to move radially in the head, a Workholding devicemounted to turn in the block, an eccentric guide fastened to thehead-bearing and engaged by the block to move it radially in the head,said guide having a gear formed thereon, and a gear connected to theWork-holder and meshed with the gear of the Aguide to rotate theWork-holder independently of the head.

4. The combination of a head-bearing, a head arranged to turn therein, ablock mounted to move radially in the head, a tube fitted to turn in theblock, a Work-holding pin or center carried in the tube, an eccentricguide fastened to the bearing and engaged by parts on the block, to moveit radially ofthe head, and a gear fastened to the tube, said gear beingin mesh With teeth formed on the guide.

5. The combination with a rotary head, a blockgmounted to slideradiallyA thereon, a sleeve mounted to turn in the block and providedWith a gear at one end, an eccentric guide with which the block engagesand by means of which the block is moved radially in and out, aneccentric internal gear with which the gear of the sleeve meshes, asliding and spring -pressed Work holding pin mounted in the sleeve andprovided with a reduced end projecting out through the sleeve and havinga head thereon, and an adjustable cam-guide curved in the path of themove-v ment of the Work-holding pin and with which the head of the saidpin engages, as set forth.

6. In a lathe, the combination with a revoluble cutter-head, ofradially-slotted heads mounted to turn at the ends ofthe cutterhead,blocks radially movable in the slots of said heads, Work-holding devicesmounted to turn in the blocks and each provided with a gear-Wheel at oneend, guides eccentric to the bearings of the heads and With which theblocks engage to move them in and out in theY slots of said heads, andan eccentric and stationary internal gear carried by each guide, saidgears meshing with the .gear-Wheels of the Work-holding devices, as setforth.

7. In a lathe, the combination with a revoluble cutter-head, of arevoluble head at each end of the cutter-head and providedwith radialslots, blocks mounted to slide in the slots of said heads, sleevesmounted to turn in the blocks and each provided With a gear-Wheel at oneend, Work-holding pins carried by the blocks, guides eccentric to thebearings of the heads and engaging said blocks to move them back andforth in the slots of the heads,I and stationary and eccentric internalgears carried by the guides and meshing with the gear-Wheels of thesleeves, as set forth.

8. In a lathe, the combination with arevoluble cutter-head, of arevoluble head at each end of the cutter-head and provided with radialslots, blocks mounted to slide in the said slots, sleeves mounted toturn in the blocks and each provided with a gear-Wheel at oneend, work-holding pins mounted in the sleeves, the pins carried by the sleeves ofone head being axially movable and springpressed, While the pins carriedby the sleeves of the other head are axially immovable, guides eccentricto the bearings of the heads and with which the blocks engage to movethem back and forth in the slots, eccentric and stationary internalgears with which the gears of the sleeves mesh, and a cam-guide curvedin the path of movement of the axially-movable pins and with which saidpins at predetermined times engage, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

OSCAR G. EDMoND.

Witnesses:

OTTO W. RINGLE, HILDA M. RINGLE.

